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Effect of the stator slot opening on the electromagnetic vibration in a squirrel‐cage induction motor
Author(s) -
Onodera Satoru,
Yamasawa Kiyohito
Publication year - 1994
Publication title -
electrical engineering in japan
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.136
H-Index - 28
eISSN - 1520-6416
pISSN - 0424-7760
DOI - 10.1002/eej.4391140213
Subject(s) - stator , squirrel cage rotor , magnetomotive force , vibration , harmonics , induction motor , permeance , rotor (electric) , harmonic , physics , air gap (plumbing) , mechanics , acoustics , control theory (sociology) , engineering , electrical engineering , materials science , computer science , membrane , biology , permeation , control (management) , voltage , artificial intelligence , composite material , genetics
Field harmonics produce a radial electromagnetic force in a squirrel‐cage induction motor with a particular number of rotor slots corresponding to the number of poles. The radial force causes vibration and acoustic noise. In this paper, a simplified equation for the radial force at no‐load is introduced, and the relation between the width of the stator slot opening and the radial force is discussed quantitatively. The field harmonic component produced by the interaction between the fundamental magnetomotive force due to the stator current and the pulsation of air‐gap permeance dominates for the radial force. Furthermore, the vibration of the stator core due to the radial force is calculated under a simple assumption. The calculated results are verified by experiments.